- Category:Trees of Alabama into Category:Trees of the Southeastern United States
- Category:Trees of Arizona into Category:Trees of the Southwestern United States
- Category:Trees of Arkansas into Category:Trees of the Southeastern United States
- Category:Trees of California into Category:Trees of the Southwestern United States
- Category:Trees of Colorado into Category:Trees of the Northwestern United States
- Category:Trees of Connecticut into Category:Trees of the Northeastern United States
- Category:Trees of Delaware into Category:Trees of the Southeastern United States
- Category:Trees of Florida into Category:Trees of the Southeastern United States
- Category:Trees of Georgia (U.S. state) into Category:Trees of the Southeastern United States
- Category:Trees of Idaho into Category:Trees of the Northwestern United States
- Category:Trees of Illinois into Category:Trees of the Great Lakes region (North America)
- Category:Trees of Indiana into Category:Trees of the Great Lakes region (North America)
- Category:Trees of Iowa into Category:Trees of the United States (this category isn't in any of the region categories)
- Category:Trees of Kansas into Category:Trees of the United States (this category isn't in any of the region categories)
- Category:Trees of Kentucky into Category:Trees of the Southeastern United States
- Category:Trees of Louisiana into Category:Trees of the Southeastern United States
- Category:Trees of Maine into Category:Trees of the Northeastern United States
- Category:Trees of Maryland into Category:Trees of the Southeastern United States
- Category:Trees of Massachusetts into Category:Trees of the Northeastern United States
- Category:Trees of Michigan into Category:Trees of the Great Lakes region (North America)
- Category:Trees of Minnesota into Category:Trees of the Great Lakes region (North America)
- Category:Trees of Mississippi into Category:Trees of the Southeastern United States
- Category:Trees of Missouri into Category:Trees of the United States (this category isn't in any of the region categories)
- Category:Trees of Montana into Category:Trees of the Northwestern United States
- Category:Trees of Nebraska into Category:Trees of the United States (this category isn't in any of the region categories)
- Category:Trees of Nevada into Category:Trees of the Southwestern United States
- Category:Trees of New Hampshire into Category:Trees of the Northeastern United States
- Category:Trees of New Jersey into Category:Trees of the Northeastern United States
- Category:Trees of New Mexico into Category:Trees of the South-Central United States
- Category:Trees of New York into Category:Trees of the Northeastern United States and Category:Trees of the Great Lakes region (North America)
- Category:Trees of North Carolina into Category:Trees of the Southeastern United States
- Category:Trees of Ohio into Category:Trees of the Great Lakes region (North America)
- Category:Trees of Oklahoma into Category:Trees of the Southern United States
- Category:Trees of Oregon into Category:Trees of the Northwestern United States
- Category:Trees of Pennsylvania into Category:Trees of the United States (this category isn't in any of the region categories)
- Category:Trees of Rhode Island into Category:Trees of the Northeastern United States
- Category:Trees of South Carolina into Category:Trees of the Southeastern United States
- Category:Trees of South Dakota into Category:Trees of the United States (this category isn't in any of the region categories)
- Category:Trees of Tennessee into Category:Trees of the Southeastern United States
- Category:Trees of Texas into Category:Trees of the South-Central United States
- Category:Trees of Utah into Category:Trees of the Southwestern United States
- Category:Trees of Vermont into Category:Trees of the Northeastern United States
- Category:Trees of Virginia into Category:Trees of the Southeastern United States
- Category:Trees of Washington (state) into Category:Trees of the Northwestern United States
- Category:Trees of Washington, D.C. into Category:Trees of the Southeastern United States
- Category:Trees of West Virginia into Category:Trees of the Northeastern United States
- Category:Trees of Wisconsin into Category:Trees of the Great Lakes region (North America)
- Category:Trees of Wyoming into Category:Trees of the Northwestern United States
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